scholarly journals Heterospecific alarm call recognition in a non-vocal reptile

2007 ◽  
Vol 3 (6) ◽  
pp. 632-634 ◽  
Author(s):  
Maren N Vitousek ◽  
James S Adelman ◽  
Nathan C Gregory ◽  
James J. H. St Clair
Keyword(s):  
Vocal Communication ◽  
Alarm Call ◽  
Auditory Discrimination ◽  
Alarm Calls ◽  
Amblyrhynchus Cristatus ◽  
Call Recognition ◽  
Remarkable Degree ◽  
Marine Iguana ◽  
Predator Behaviour

The ability to recognize and respond to the alarm calls of heterospecifics has previously been described only in species with vocal communication. Here we provide evidence that a non-vocal reptile, the Galápagos marine iguana ( Amblyrhynchus cristatus ), can eavesdrop on the alarm call of the Galápagos mockingbird ( Nesomimus parvulus ) and respond with anti-predator behaviour. Eavesdropping on complex heterospecific communications demonstrates a remarkable degree of auditory discrimination in a non-vocal species.

scholarly journals Heterospecific alarm-call recognition in two warbler hosts of common cuckoos

2019 ◽  
Vol 22 (6) ◽  
pp. 1149-1157 ◽  
Author(s):  
Jiangping Yu ◽  
Hailin Lu ◽  
Wei Sun ◽  
Wei Liang ◽  
Haitao Wang ◽  
...  
Keyword(s):  
Alarm Call ◽  
Alarm Calls ◽  
Reed Warbler ◽  
Cuculus Canorus ◽  
Common Cuckoo ◽  
Playback Experiments ◽  
Call Recognition ◽  
Accipiter Nisus ◽  
Main Host ◽  
The Common

Abstract Species facing similar selection pressures should recognize heterospecific alarm signals. However, no study has so far examined heterospecific alarm-call recognition in response to parasitism by cuckoos. In this study, we tested whether two sympatric host species of the common cuckoo Cuculus canorus, Oriental reed warbler Acrocephalus orientalis (ORW, main host), and black-browed reed warbler Acrocephalus bistrigiceps (BRW, rare host), could recognize each other’s alarm calls in response to cuckoos. Dummies of common cuckoo (parasite) and Eurasian sparrowhawk Accipiter nisus (predator) were used to induce and record alarm calls of the two warbler species, respectively. In the conspecific alarm-call playback experiments, ORW responded more strongly to cuckoo alarm calls than to sparrowhawk alarm calls, while BRW responded less strongly to cuckoo alarm calls than to sparrowhawk alarm calls. In the heterospecific alarm-call playback experiments, both ORW and BRW responded less strongly to cuckoo alarm calls than sparrowhawk alarm calls. BRW seemed to learn the association between parasite-related alarm calls of the ORW and the cuckoo by observing the process of ORW attacking cuckoos. In contrast, alarm calls of BRW to cuckoos were rarely recorded in most cases. BRW with low parasite pressure still developed recognition of heterospecific parasite-related alarm call. Unintended receivers in the same community should recognize heterospecific alarm calls precisely to extract valuable information.

Swimming, Diving and Lactate Production of the Marine Iguana, Amblyrhynchus cristatus

Copeia ◽  
1976 ◽  
Vol 1976 (4) ◽  
pp. 709 ◽  
Author(s):  
George A. Bartholomew ◽  
Albert F. Bennett ◽  
William R. Dawson
Keyword(s):  
Lactate Production ◽  
Amblyrhynchus Cristatus ◽  
Marine Iguana

scholarly journals Exploring the Adaptive Significance of Five Types of Puma (Puma concolor) Vocalizations

2017 ◽  
Vol 130 (4) ◽  
pp. 289 ◽  
Author(s):  
Maximilian L Allen ◽  
Yiwei Wang ◽  
Christopher C Wilmers
Keyword(s):  
Vocal Communication ◽  
Puma Concolor ◽  
Scent Marking ◽  
Adaptive Significance ◽  
Alarm Calls ◽  
Central Component ◽  
Video Cameras ◽  
In The Wild ◽  
Indirect Cues ◽  
Limit Detection

Communication is a central component of animal behaviour, yet communicative behaviours are poorly studied due to their complexity and varied functions. Pumas (Puma concolor) are wide-ranging, solitary felids that primarily use indirect cues (e.g., scent marking) for communication. Because these cryptic carnivores are rarely observed directly, little is known about their vocalizations in the wild. We recorded a variety of Puma vocalizations among females and family groups using motion-triggered video cameras and then attempted to understand the function of each vocalization. We found two categories of vocalizations: 1) attention-attracting (caterwauling and mewing), and 2) calls (contact, agitated, and alarm). Vocalizations to attract attention ranged across broad frequencies. Contact, agitated, and alarm calls are narrow-frequency vocalizations that varied in intensity and were used to communicate with nearby conspecifics. Vocal communication entails risk, and while some Puma vocalizations may provide benefits that outweigh their risk, others are structured to limit detection and risk. These observations highlight the importance of the structure of vocalizations used during different behaviours to understand their adaptive significance.

scholarly journals Testing the maintenance of natural responses to survival-relevant calls in the conservation breeding population of a critically endangered corvid (Corvus hawaiiensis)

2021 ◽  
Author(s):  
Anne C Sabol ◽  
Alison L Greggor ◽  
Bryce Masuda ◽  
Ronald R Swaisgood
Keyword(s):  
Vocal Communication ◽  
Alarm Call ◽  
Breeding Population ◽  
Vocal Behavior ◽  
Vocal Response ◽  
Human Care ◽  
Territorial Intrusion ◽  
Species Specific ◽  
Individual Consistency ◽  
Conservation Breeding

Vocal communication serves an important role in driving animals' social interactions and ultimately their survival. However, natural vocal behavior can erode in human care. Determining if animals in conservation breeding programs exhibit and respond appropriately to species-specific vocalizations is therefore important for ensuring their survival post-release. We tested whether endangered 'alala (Corvus hawaiiensis), which are extinct in nature, have retained their natural responses to survival-relevant vocal calls. We conducted our studies on breeding populations derived from a small number of founding 'alala maintained in human care since their extinction in the wild in 2002. We presented pairs of 'alala with alarm, territorial intrusion, and two types of control playback calls (a non-threatening territorial maintenance call and a novel heterospecific call). 'Alala were significantly more likely to approach the speaker following alarm call playback than other call types, and were more likely to respond to territorial intrusion calls with the same aggressive territorial calls. Males were more likely to make these aggressive calls than females, mirroring their roles in territory defense. We also found individual consistency in the level of vocal behavior response across all call types, indicating that some individuals are more vocal than others. These results are encouraging, showing that 'alala exhibit relevant, species-specific behaviors despite generations under human care. It does illustrate, however, that all individuals do not respond uniformly, so vocal response may be an important factor to consider in determining the release suitability of individuals.

scholarly journals A REAPPRAISAL OF THE AQUATIC SPECIALIZATIONS OF THE GALAPAGOS MARINE IGUANA (AMBLYRHYNCHUS CRISTATUS)

Evolution ◽  
1977 ◽  
Vol 31 (4) ◽  
pp. 891-897
Author(s):  
William R. Dawson ◽  
George A. Bartholomew ◽  
Albert F. Bennett
Keyword(s):  
Amblyrhynchus Cristatus ◽  
Marine Iguana

scholarly journals Specific responses of cuckoo hosts to different alarm signals according to breeding stage: a test of the offspring value hypothesis

2020 ◽  
Vol 66 (6) ◽  
pp. 649-655 ◽  
Author(s):  
Jiaojiao Wang ◽  
Canchao Yang
Keyword(s):  
Alarm Call ◽  
Host Responses ◽  
Alarm Calls ◽  
Attack Behavior ◽  
Brood Parasite ◽  
Reed Warbler ◽  
Defense Strategies ◽  
Breeding Stage ◽  
Accipiter Nisus ◽  
Streptopelia Orientalis

Abstract The selective pressure exerted by avian brood parasites forces their hosts to evolve specific defense strategies. When subject to brood parasite attack, avian hosts will often emit alarm calls. To date, few studies have examined whether and how host responses to different alarm calls indicative of different enemies vary with the host’s breeding stage. We carried out alarm call playback experiments during both the egg and nestling stages of the oriental reed warbler Acrocephalus orientalis, a host of the common cuckoo Cuculus canorus. The playback exemplars were selected from recorded alarm calls of the warbler to the presence of common cuckoos, sparrowhawks Accipiter nisus, and oriental turtle doves Streptopelia orientalis, which represented brood parasite, predator, and harmless control, respectively. The results showed that the oriental reed warblers did not discriminate alarm calls issued to different intruder types, but the intensity of the response was significantly higher in the nestling stage than in the egg stage. Attack behavior related to sparrowhawk alarm calls was absent in the egg stage, but aggressive behavior increased dramatically and exceeded the attack frequency in response to the cuckoo alarm call in the nestling stage, implying a shift in the tradeoff between the parents’ own survival and the loss of offspring. Alarm calls attracted a larger number of conspecifics than members of other species. In general, the oriental reed warbler had consistently stronger responses to different alarm calls in the nestling stage than in the egg stage, supporting the offspring value hypothesis.

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